on these naturally makes no difference, because we should certainly choose them even though no Pleasure resulted from them.
It seems then to be plain that Pleasure is not the Chief Good, nor is every kind of it choice-worthy: and that there are some choice-worthy in themselves, differing in kind, i.e. in the sources from which they are derived. Let this then suffice by way of an account of the current maxims respecting Pleasure and Pain.
Chapter III.
Now what it is, and how characterised, will be more plain if we take up the subject afresh.
An act of Sight is thought to be complete at any moment; that is to say, it lacks nothing the accession of which subsequently will complete its whole nature.
Well, Pleasure resembles this: because it is a whole, as one may say; and one could not at any moment of time take a Pleasure whose whole nature would be completed by its lasting for a longer time. And for this reason it is not a Movement: for all Movement takes place in time of certain duration and has a certain End to accomplish; for instance, the Movement of house-building221 is then only complete when the builder has produced what he intended, that is, either in the whole time [necessary to complete the whole design], or in a given portion.222 But all the subordinate Movements are incomplete in the parts of the time, and are different in kind from the whole movement and from one another (I mean, for instance, that the fitting the stones together is a Movement different from that of fluting the column, and both again from the construction of the Temple as a whole: but this last is complete as lacking nothing to the result proposed; whereas that of the basement, or of the triglyph, is incomplete, because each is a Movement of a part merely).